Documentation/devicetree/bindings/sound/nvidia,tegra210-ahub.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/sound/nvidia,tegra210-ahub.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Tegra210 AHUB Device Tree Bindings

description: |
  The Audio Hub (AHUB) comprises a collection of hardware accelerators
  for audio pre-processing, post-processing and a programmable full
  crossbar for routing audio data across these accelerators. It has
  external interfaces such as I2S, DMIC, DSPK. It interfaces with ADMA
  engine through ADMAIF.

maintainers:
  - Jon Hunter <jonathanh@nvidia.com>
  - Sameer Pujar <spujar@nvidia.com>

properties:
  $nodename:
    pattern: "^ahub@[0-9a-f]*$"

  compatible:
    oneOf:
      - enum:
          - nvidia,tegra210-ahub
          - nvidia,tegra186-ahub
      - items:
          - const: nvidia,tegra194-ahub
          - const: nvidia,tegra186-ahub

  reg:
    maxItems: 1

  clocks:
    maxItems: 1

  clock-names:
    const: ahub

  assigned-clocks:
    maxItems: 1

  assigned-clock-parents:
    maxItems: 1

  assigned-clock-rates:
    maxItems: 1

  "#address-cells":
    const: 1

  "#size-cells":
    const: 1

  ranges: true

  ports:
    $ref: /schemas/graph.yaml#/properties/ports
    description: |
      Contains list of ACIF (Audio CIF) port nodes for AHUB (Audio Hub).
      These are connected to ACIF interfaces of AHUB clients. Thus the
      number of port nodes depend on the number of clients that AHUB may
      have depending on the SoC revision.

    patternProperties:
      '^port@[0-9]':
        $ref: audio-graph-port.yaml#
        unevaluatedProperties: false

patternProperties:
  '^i2s@[0-9a-f]+$':
    type: object

  '^dmic@[0-9a-f]+$':
    type: object
    $ref: nvidia,tegra210-dmic.yaml#

  '^admaif@[0-9a-f]+$':
    type: object
    $ref: nvidia,tegra210-admaif.yaml#

  '^dspk@[0-9a-f]+$':
    type: object
    $ref: nvidia,tegra186-dspk.yaml#

  '^mvc@[0-9a-f]+$':
    type: object
    $ref: nvidia,tegra210-mvc.yaml#

  '^sfc@[0-9a-f]+$':
    type: object
    $ref: nvidia,tegra210-sfc.yaml#

  '^amx@[0-9a-f]+$':
    type: object
    $ref: nvidia,tegra210-amx.yaml#

  '^adx@[0-9a-f]+$':
    type: object
    $ref: nvidia,tegra210-adx.yaml#

  '^amixer@[0-9a-f]+$':
    type: object
    $ref: nvidia,tegra210-mixer.yaml#

required:
  - compatible
  - reg
  - clocks
  - clock-names
  - assigned-clocks
  - assigned-clock-parents
  - "#address-cells"
  - "#size-cells"
  - ranges

additionalProperties: false

examples:
  - |
    #include<dt-bindings/clock/tegra210-car.h>

    ahub@702d0800 {
        compatible = "nvidia,tegra210-ahub";
        reg = <0x702d0800 0x800>;
        clocks = <&tegra_car TEGRA210_CLK_D_AUDIO>;
        clock-names = "ahub";
        assigned-clocks = <&tegra_car TEGRA210_CLK_D_AUDIO>;
        assigned-clock-parents = <&tegra_car TEGRA210_CLK_PLL_A_OUT0>;
        #address-cells = <1>;
        #size-cells = <1>;
        ranges = <0x702d0000 0x702d0000 0x0000e400>;

        // All AHUB child nodes below
        admaif@702d0000 {
            compatible = "nvidia,tegra210-admaif";
            reg = <0x702d0000 0x800>;
            dmas = <&adma 1>,  <&adma 1>,
               <&adma 2>,  <&adma 2>,
               <&adma 3>,  <&adma 3>,
               <&adma 4>,  <&adma 4>,
               <&adma 5>,  <&adma 5>,
               <&adma 6>,  <&adma 6>,
               <&adma 7>,  <&adma 7>,
               <&adma 8>,  <&adma 8>,
               <&adma 9>,  <&adma 9>,
               <&adma 10>, <&adma 10>;
            dma-names = "rx1",  "tx1",
                    "rx2",  "tx2",
                    "rx3",  "tx3",
                    "rx4",  "tx4",
                    "rx5",  "tx5",
                    "rx6",  "tx6",
                    "rx7",  "tx7",
                    "rx8",  "tx8",
                    "rx9",  "tx9",
                    "rx10", "tx10";
        };

        i2s@702d1000 {
            compatible = "nvidia,tegra210-i2s";
            reg = <0x702d1000 0x100>;
            clocks = <&tegra_car TEGRA210_CLK_I2S0>;
            clock-names = "i2s";
            assigned-clocks = <&tegra_car TEGRA210_CLK_I2S0>;
            assigned-clock-parents = <&tegra_car TEGRA210_CLK_PLL_A_OUT0>;
            assigned-clock-rates = <1536000>;
            sound-name-prefix = "I2S1";
        };

        dmic@702d4000 {
            compatible = "nvidia,tegra210-dmic";
            reg = <0x702d4000 0x100>;
            clocks = <&tegra_car TEGRA210_CLK_DMIC1>;
            clock-names = "dmic";
            assigned-clocks = <&tegra_car TEGRA210_CLK_DMIC1>;
            assigned-clock-parents = <&tegra_car TEGRA210_CLK_PLL_A_OUT0>;
            assigned-clock-rates = <3072000>;
            sound-name-prefix = "DMIC1";
        };

        // More child nodes to follow
    };

...